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Determination of lead and cadmium in biological samples by potentiometric stripping analysis

Bestimmung von Blei und Cadmium in biologischem Material durch potentiometrische Stripping-Analyse

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Zusammenfassung

Als Trägerelektrolyt diente bei diesem Verfahren ein Gemisch von NaCl und HCl. In Gegenwart von 4% Lumatom in Methanol wurden Oxidationspotentiale von −0,46 V für Pb und −0,68 V für Cd (gegen SKE) erhalten. Die Methode wurde auf verschiedene Referenzmaterialien (Laub, Nadeln, Haar) angewendet und auch mit der Differentialpuls-Anodic Stripping-Analyse verglichen. Bei der letzteren ergaben sich größere Schwierigkeiten, hauptsächlich durch störenden Sauerstoff.

Summary

The determination of lead and cadmium in biological materials was carried out by potentiometric stripping analysis. Supporting electrolyte was a mixture of NaCl and HCl. In the presence of 4% lumatom in methanol, oxidation potentials of −0.46 V for Pb and −0.68 V for Cd were found (vs. SCE). The method was applied to different standard reference materials (leaves, needles, hair) and was also compared with the differential pulse anodic stripping technique. The latter presented considerable difficulties, in particular by the interference of oxygen.

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Authors and Affiliations

  1. Department of Chemistry, La Trobe University, 3083, Bundoora, Melbourne, Victoria, Australia

    M. Rozali bin Othman, J. O. Hill & R. J. Magee

Authors
  1. M. Rozali bin Othman
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  2. J. O. Hill
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  3. R. J. Magee
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Rozali bin Othman, M., Hill, J.O. & Magee, R.J. Determination of lead and cadmium in biological samples by potentiometric stripping analysis. Z. Anal. Chem. 326, 350–353 (1987). https://doi.org/10.1007/BF00469783

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  • DOI: https://doi.org/10.1007/BF00469783

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